n="5F15";
n10=int(n,16)
how="sorry, there some wrongs."
if(n10>=2048 and n10<=65535):
    n2=bin(n10);
    print(n2[-16:])
    utf8="1110"+n2[-16:-12]+"10"+n2[-12:-6]+"10"+n2[-6:]
    print(utf8)
    #print(hex(int(utf8,2)))
else:
    print(how)
